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<title>VectSharp: VectSharp/Filters/MaskFilter.cs Source File</title>
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   <div id="projectname">VectSharp<span id="projectnumber">&#160;2.6.1</span>
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   <div id="projectbrief">A light library for C# vector graphics</div>
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<div class="header">
  <div class="headertitle"><div class="title">MaskFilter.cs</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">    VectSharp - A light library for C# vector graphics.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">    Copyright (C) 2020-2022 Giorgio Bianchini</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"></span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment">    This program is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment">    it under the terms of the GNU Lesser General Public License as published by</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">    the Free Software Foundation, version 3.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment">    This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">    GNU Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"></span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">    You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">    along with this program. If not, see &lt;https://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment">*/</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="keyword">using </span>System;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="keyword">using </span>System.Diagnostics.Contracts;</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="keyword">using </span>System.Threading.Tasks;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespace_vect_sharp_1_1_filters.html">VectSharp.Filters</a></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span>{<span class="comment"></span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment">    /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="comment">    /// Represents a filter that uses the luminance of an image to mask another image.</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment">    /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html">   27</a></span><span class="comment"></span>    <span class="keyword">public</span> <span class="keyword">class </span><a class="code hl_class" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html">MaskFilter</a> : <a class="code hl_class" href="class_vect_sharp_1_1_filters_1_1_filter_with_rasterisable_parameter.html">FilterWithRasterisableParameter</a>, <a class="code hl_interface" href="interface_vect_sharp_1_1_filters_1_1_i_filter_with_location.html">IFilterWithLocation</a></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>    {<span class="comment"></span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="comment">        /// &lt;inheritdoc/&gt;</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a7eebe60112e031013256ef3fb22f6d97">   30</a></span><span class="comment"></span>        <span class="keyword">public</span> <a class="code hl_struct" href="struct_vect_sharp_1_1_point.html">Point</a> <a class="code hl_property" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a7eebe60112e031013256ef3fb22f6d97">TopLeftMargin</a> =&gt; <span class="keyword">new</span> <a class="code hl_struct" href="struct_vect_sharp_1_1_point.html">Point</a>(0, 0);<span class="comment"></span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment">        /// &lt;inheritdoc/&gt;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a3200cf0a92b90911d44ee2aac4df14d8">   32</a></span><span class="comment"></span>        <span class="keyword">public</span> <a class="code hl_struct" href="struct_vect_sharp_1_1_point.html">Point</a> <a class="code hl_property" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a3200cf0a92b90911d44ee2aac4df14d8">BottomRightMargin</a> =&gt; <span class="keyword">new</span> <a class="code hl_struct" href="struct_vect_sharp_1_1_point.html">Point</a>(0, 0);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="comment"></span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="comment">        /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="comment">        /// The image that is used to mask the input image.</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment">        /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#aecd557d4fa4b858be5323ea366366d62">   37</a></span><span class="comment"></span>        <span class="keyword">public</span> <a class="code hl_class" href="class_vect_sharp_1_1_graphics.html">Graphics</a> <a class="code hl_property" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#aecd557d4fa4b858be5323ea366366d62">Mask</a> =&gt; this.RasterisableParameter;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment"></span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment">        /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment">        /// Creates a new &lt;see cref=&quot;MaskFilter&quot;/&gt; with the specified mask image.</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="comment">        /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="comment">        /// &lt;param name=&quot;mask&quot;&gt;The image that is used to mask the input image.&lt;/param&gt;</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a9056e6728b43dfd19c6b28949e52f3f1">   43</a></span><span class="comment"></span>        <span class="keyword">public</span> <a class="code hl_function" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a9056e6728b43dfd19c6b28949e52f3f1">MaskFilter</a>(<a class="code hl_class" href="class_vect_sharp_1_1_graphics.html">Graphics</a> mask) : base(mask) { }</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment"></span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="comment">        /// &lt;inheritdoc/&gt;</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="comment"></span>        [Pure]</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a8ab04db2554d72d05e033ff7c310f594">   47</a></span>        <span class="keyword">public</span> <a class="code hl_class" href="class_vect_sharp_1_1_raster_image.html">RasterImage</a> <a class="code hl_function" href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a8ab04db2554d72d05e033ff7c310f594">Filter</a>(<a class="code hl_class" href="class_vect_sharp_1_1_raster_image.html">RasterImage</a> image, <a class="code hl_struct" href="struct_vect_sharp_1_1_rectangle.html">Rectangle</a> bounds, <span class="keywordtype">double</span> scale)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>        {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>            <a class="code hl_class" href="class_vect_sharp_1_1_raster_image.html">RasterImage</a> mask = this.GetCachedRasterisation(scale);</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>            IntPtr tbrData = System.Runtime.InteropServices.Marshal.AllocHGlobal(image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a5c022bcd18b4e37c26df5ec67c8c2b71">Width</a> * image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a7fdcc792321aae93369d85c280bf696c">Height</a> * 4);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>            GC.AddMemoryPressure(image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a5c022bcd18b4e37c26df5ec67c8c2b71">Width</a> * image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a7fdcc792321aae93369d85c280bf696c">Height</a> * 4);</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>            <span class="keywordtype">int</span> width = image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a5c022bcd18b4e37c26df5ec67c8c2b71">Width</a>;</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>            <span class="keywordtype">int</span> height = image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a7fdcc792321aae93369d85c280bf696c">Height</a>;</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span> </div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>            <span class="keywordtype">int</span> pixelSizeInput = image.HasAlpha ? 4 : 3;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>            <span class="keywordtype">int</span> strideInput = image.Width * pixelSizeInput;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>            <span class="keywordtype">int</span> pixelSizeOutput = 4;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>            <span class="keywordtype">int</span> strideOutput = image.Width * pixelSizeOutput;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>            <span class="keywordtype">int</span> pixelSizeMask = 4;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>            <span class="keywordtype">int</span> strideMask = mask.Width * pixelSizeMask;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>            <span class="keywordtype">int</span> maskWidth = mask.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a5c022bcd18b4e37c26df5ec67c8c2b71">Width</a>;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>            <span class="keywordtype">int</span> maskHeight = mask.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a7fdcc792321aae93369d85c280bf696c">Height</a>;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>            <span class="keywordtype">int</span> threads = Math.Min(8, Environment.ProcessorCount);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>            unsafe</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>            {</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>                <span class="keywordtype">byte</span>* input = (<span class="keywordtype">byte</span>*)image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#aaa0c2c00b3f570797d0eb31ea899dae2">ImageDataAddress</a>;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>                <span class="keywordtype">byte</span>* maskBytes = (<span class="keywordtype">byte</span>*)mask.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#aaa0c2c00b3f570797d0eb31ea899dae2">ImageDataAddress</a>;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>                <span class="keywordtype">byte</span>* output = (<span class="keywordtype">byte</span>*)tbrData;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>                Action&lt;int&gt; yLoop;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>                <span class="keywordflow">if</span> (image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a3012ff06029d327b3a280260fb2207f2">HasAlpha</a>)</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>                {</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>                    yLoop = (y) =&gt;</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>                    {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>                        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = 0; x &lt; width; x++)</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>                        {</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>                            <span class="keywordtype">int</span> maskX = (int)Math.Round((bounds.<a class="code hl_variable" href="struct_vect_sharp_1_1_rectangle.html#a70c8f442271179e7cdd148435c132ded">Location</a>.<a class="code hl_variable" href="struct_vect_sharp_1_1_point.html#a5ec116350a6220c1b0c5e7115fa24115">X</a> + (x + 0.5) * bounds.Size.Width / width - CachedBounds.Location.X) / CachedBounds.Size.Width * maskWidth);</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>                            <span class="keywordtype">int</span> maskY = (int)Math.Round((bounds.<a class="code hl_variable" href="struct_vect_sharp_1_1_rectangle.html#a70c8f442271179e7cdd148435c132ded">Location</a>.<a class="code hl_variable" href="struct_vect_sharp_1_1_point.html#ae56e39cc16440deee22e54e89024f044">Y</a> + (y + 0.5) * bounds.Size.Height / height - CachedBounds.Location.Y) / CachedBounds.Size.Height * maskHeight);</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>                            <span class="keywordtype">double</span> weight = 0;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>                            <span class="keywordflow">if</span> (maskX &gt;= 0 &amp;&amp; maskX &lt; maskWidth &amp;&amp; maskY &gt;= 0 &amp;&amp; maskY &lt; maskHeight)</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>                            {</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>                                weight = (maskBytes[maskY * strideMask + maskX * pixelSizeMask] * 0.2126 + maskBytes[maskY * strideMask + maskX * pixelSizeMask + 1] * 0.7152 + maskBytes[maskY * strideMask + maskX * pixelSizeMask + 2] * 0.0722) / 255.0;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>                                <span class="keywordflow">if</span> (mask.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a3012ff06029d327b3a280260fb2207f2">HasAlpha</a>)</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>                                {</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>                                    weight *= maskBytes[maskY * strideMask + maskX * pixelSizeMask + 3] / 255.0;</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>                                }</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>                            }</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>                            <span class="keywordflow">if</span> (weight &gt; 0)</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>                            {</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>                                output[y * strideOutput + x * 4] = input[y * strideInput + x * 4];</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>                                output[y * strideOutput + x * 4 + 1] = input[y * strideInput + x * 4 + 1];</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>                                output[y * strideOutput + x * 4 + 2] = input[y * strideInput + x * 4 + 2];</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>                                output[y * strideOutput + x * 4 + 3] = (byte)Math.Round(input[y * strideInput + x * 4 + 3] * weight);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>                            }</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>                            <span class="keywordflow">else</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>                            {</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>                                output[y * strideOutput + x * 4] = 0;</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>                                output[y * strideOutput + x * 4 + 1] = 0;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>                                output[y * strideOutput + x * 4 + 2] = 0;</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>                                output[y * strideOutput + x * 4 + 3] = 0;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>                            }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>                        }</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>                    };</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>                }</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>                <span class="keywordflow">else</span></div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>                {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>                    yLoop = (y) =&gt;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>                    {</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>                        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = 0; x &lt; width; x++)</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>                        {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>                            <span class="keywordtype">int</span> maskX = (int)Math.Round((bounds.<a class="code hl_variable" href="struct_vect_sharp_1_1_rectangle.html#a70c8f442271179e7cdd148435c132ded">Location</a>.<a class="code hl_variable" href="struct_vect_sharp_1_1_point.html#a5ec116350a6220c1b0c5e7115fa24115">X</a> + (x + 0.5) * bounds.Size.Width / width - CachedBounds.Location.X) / CachedBounds.Size.Width * maskWidth);</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>                            <span class="keywordtype">int</span> maskY = (int)Math.Round((bounds.<a class="code hl_variable" href="struct_vect_sharp_1_1_rectangle.html#a70c8f442271179e7cdd148435c132ded">Location</a>.<a class="code hl_variable" href="struct_vect_sharp_1_1_point.html#ae56e39cc16440deee22e54e89024f044">Y</a> + (y + 0.5) * bounds.Size.Height / height - CachedBounds.Location.Y) / CachedBounds.Size.Height * maskHeight);</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span> </div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>                            <span class="keywordtype">double</span> weight = 0;</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>                            <span class="keywordflow">if</span> (maskX &gt;= 0 &amp;&amp; maskX &lt; maskWidth &amp;&amp; maskY &gt;= 0 &amp;&amp; maskY &lt; maskHeight)</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>                            {</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>                                weight = (maskBytes[maskY * strideMask + maskX * pixelSizeMask] * 0.2126 + maskBytes[maskY * strideMask + maskX * pixelSizeMask + 1] * 0.7152 + maskBytes[maskY * strideMask + maskX * pixelSizeMask + 2] * 0.0722);</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>                                <span class="keywordflow">if</span> (mask.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a3012ff06029d327b3a280260fb2207f2">HasAlpha</a>)</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>                                {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>                                    weight *= maskBytes[maskY * strideMask + maskX * pixelSizeMask + 3] / 255.0;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>                                }</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>                            }</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span> </div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>                            <span class="keywordflow">if</span> (weight &gt; 0)</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>                            {</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>                                output[y * strideOutput + x * 4] = input[y * strideInput + x * 3];</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>                                output[y * strideOutput + x * 4 + 1] = input[y * strideInput + x * 3 + 1];</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>                                output[y * strideOutput + x * 4 + 2] = input[y * strideInput + x * 3 + 2];</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>                                output[y * strideOutput + x * 4 + 3] = (byte)Math.Round(weight);</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>                            }</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>                            <span class="keywordflow">else</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>                            {</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>                                output[y * strideOutput + x * 4] = 0;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>                                output[y * strideOutput + x * 4 + 1] = 0;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>                                output[y * strideOutput + x * 4 + 2] = 0;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>                                output[y * strideOutput + x * 4 + 3] = 0;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>                            }</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>                        }</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>                    };</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>                }</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span> </div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>                <span class="keywordflow">if</span> (threads == 1)</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>                {</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>                    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = 0; y &lt; height; y++)</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>                    {</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>                        yLoop(y);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>                    }</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>                }</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>                <span class="keywordflow">else</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>                {</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>                    ParallelOptions options = <span class="keyword">new</span> ParallelOptions() { MaxDegreeOfParallelism = threads };</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span> </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>                    Parallel.For(0, height, options, yLoop);</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>                }</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>            }</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span> </div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>            <a class="code hl_class" href="class_vect_sharp_1_1_disposable_int_ptr.html">DisposableIntPtr</a> disp = <span class="keyword">new</span> <a class="code hl_class" href="class_vect_sharp_1_1_disposable_int_ptr.html">DisposableIntPtr</a>(tbrData);</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>            <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code hl_class" href="class_vect_sharp_1_1_raster_image.html">RasterImage</a>(ref disp, width, height, image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a3012ff06029d327b3a280260fb2207f2">HasAlpha</a>, image.<a class="code hl_property" href="class_vect_sharp_1_1_raster_image.html#a5a5e8f5228b8aa3aa103693265fa900e">Interpolate</a>);</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span> </div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>        }</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>    }</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>}</div>
<div class="ttc" id="aclass_vect_sharp_1_1_disposable_int_ptr_html"><div class="ttname"><a href="class_vect_sharp_1_1_disposable_int_ptr.html">VectSharp.DisposableIntPtr</a></div><div class="ttdoc">An IDisposable wrapper around an IntPtr that frees the allocated memory when it is disposed.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00054">RasterImage.cs:55</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_filter_with_rasterisable_parameter_html"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_filter_with_rasterisable_parameter.html">VectSharp.Filters.FilterWithRasterisableParameter</a></div><div class="ttdoc">Represents a filter with a parameter that needs to be rasterised at the same resolution as the subjec...</div><div class="ttdef"><b>Definition:</b> <a href="_filters_8cs_source.html#l00089">Filters.cs:90</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html">VectSharp.Filters.MaskFilter</a></div><div class="ttdoc">Represents a filter that uses the luminance of an image to mask another image.</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00027">MaskFilter.cs:28</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html_a3200cf0a92b90911d44ee2aac4df14d8"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a3200cf0a92b90911d44ee2aac4df14d8">VectSharp.Filters.MaskFilter.BottomRightMargin</a></div><div class="ttdeci">Point BottomRightMargin</div><div class="ttdoc">Determines how much the area of the filter's subject should be expanded on the bottom-right to accomm...</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00032">MaskFilter.cs:32</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html_a7eebe60112e031013256ef3fb22f6d97"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a7eebe60112e031013256ef3fb22f6d97">VectSharp.Filters.MaskFilter.TopLeftMargin</a></div><div class="ttdeci">Point TopLeftMargin</div><div class="ttdoc">Determines how much the area of the filter's subject should be expanded on the top-left to accommodat...</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00030">MaskFilter.cs:30</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html_a8ab04db2554d72d05e033ff7c310f594"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a8ab04db2554d72d05e033ff7c310f594">VectSharp.Filters.MaskFilter.Filter</a></div><div class="ttdeci">RasterImage Filter(RasterImage image, Rectangle bounds, double scale)</div><div class="ttdoc">Applies the filter to a RasterImage. A new RasterImage containing the filtered image....</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00047">MaskFilter.cs:47</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html_a9056e6728b43dfd19c6b28949e52f3f1"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#a9056e6728b43dfd19c6b28949e52f3f1">VectSharp.Filters.MaskFilter.MaskFilter</a></div><div class="ttdeci">MaskFilter(Graphics mask)</div><div class="ttdoc">Creates a new MaskFilter with the specified mask image.</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00043">MaskFilter.cs:43</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_filters_1_1_mask_filter_html_aecd557d4fa4b858be5323ea366366d62"><div class="ttname"><a href="class_vect_sharp_1_1_filters_1_1_mask_filter.html#aecd557d4fa4b858be5323ea366366d62">VectSharp.Filters.MaskFilter.Mask</a></div><div class="ttdeci">Graphics Mask</div><div class="ttdoc">The image that is used to mask the input image.</div><div class="ttdef"><b>Definition:</b> <a href="_mask_filter_8cs_source.html#l00037">MaskFilter.cs:37</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_graphics_html"><div class="ttname"><a href="class_vect_sharp_1_1_graphics.html">VectSharp.Graphics</a></div><div class="ttdoc">Represents an abstract drawing surface.</div><div class="ttdef"><b>Definition:</b> <a href="_graphics_8cs_source.html#l00279">Graphics.cs:280</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html">VectSharp.RasterImage</a></div><div class="ttdoc">Represents a raster image, created from raw pixel data. Consider using the derived classes included i...</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00100">RasterImage.cs:101</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html_a3012ff06029d327b3a280260fb2207f2"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html#a3012ff06029d327b3a280260fb2207f2">VectSharp.RasterImage.HasAlpha</a></div><div class="ttdeci">bool HasAlpha</div><div class="ttdoc">Determines whether the image has an alpha channel.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00120">RasterImage.cs:120</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html_a5a5e8f5228b8aa3aa103693265fa900e"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html#a5a5e8f5228b8aa3aa103693265fa900e">VectSharp.RasterImage.Interpolate</a></div><div class="ttdeci">bool Interpolate</div><div class="ttdoc">Determines whether the image should be interpolated when it is resized.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00135">RasterImage.cs:135</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html_a5c022bcd18b4e37c26df5ec67c8c2b71"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html#a5c022bcd18b4e37c26df5ec67c8c2b71">VectSharp.RasterImage.Width</a></div><div class="ttdeci">int Width</div><div class="ttdoc">The width in pixels of the image.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00125">RasterImage.cs:125</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html_a7fdcc792321aae93369d85c280bf696c"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html#a7fdcc792321aae93369d85c280bf696c">VectSharp.RasterImage.Height</a></div><div class="ttdeci">int Height</div><div class="ttdoc">The height in pixels of the image.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00130">RasterImage.cs:130</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_raster_image_html_aaa0c2c00b3f570797d0eb31ea899dae2"><div class="ttname"><a href="class_vect_sharp_1_1_raster_image.html#aaa0c2c00b3f570797d0eb31ea899dae2">VectSharp.RasterImage.ImageDataAddress</a></div><div class="ttdeci">IntPtr ImageDataAddress</div><div class="ttdoc">The memory address of the image pixel data.</div><div class="ttdef"><b>Definition:</b> <a href="_raster_image_8cs_source.html#l00105">RasterImage.cs:105</a></div></div>
<div class="ttc" id="ainterface_vect_sharp_1_1_filters_1_1_i_filter_with_location_html"><div class="ttname"><a href="interface_vect_sharp_1_1_filters_1_1_i_filter_with_location.html">VectSharp.Filters.IFilterWithLocation</a></div><div class="ttdoc">Represents a filter whose results depend on the position of the subject image on the graphics surface...</div><div class="ttdef"><b>Definition:</b> <a href="_filters_8cs_source.html#l00057">Filters.cs:58</a></div></div>
<div class="ttc" id="anamespace_vect_sharp_1_1_filters_html"><div class="ttname"><a href="namespace_vect_sharp_1_1_filters.html">VectSharp.Filters</a></div><div class="ttdef"><b>Definition:</b> <a href="_box_blur_filter_8cs_source.html#l00022">BoxBlurFilter.cs:23</a></div></div>
<div class="ttc" id="astruct_vect_sharp_1_1_point_html"><div class="ttname"><a href="struct_vect_sharp_1_1_point.html">VectSharp.Point</a></div><div class="ttdoc">Represents a point relative to an origin in the top-left corner.</div><div class="ttdef"><b>Definition:</b> <a href="_point_8cs_source.html#l00031">Point.cs:32</a></div></div>
<div class="ttc" id="astruct_vect_sharp_1_1_point_html_a5ec116350a6220c1b0c5e7115fa24115"><div class="ttname"><a href="struct_vect_sharp_1_1_point.html#a5ec116350a6220c1b0c5e7115fa24115">VectSharp.Point.X</a></div><div class="ttdeci">double X</div><div class="ttdoc">Horizontal (x) coordinate, measured to the right of the origin.</div><div class="ttdef"><b>Definition:</b> <a href="_point_8cs_source.html#l00036">Point.cs:36</a></div></div>
<div class="ttc" id="astruct_vect_sharp_1_1_point_html_ae56e39cc16440deee22e54e89024f044"><div class="ttname"><a href="struct_vect_sharp_1_1_point.html#ae56e39cc16440deee22e54e89024f044">VectSharp.Point.Y</a></div><div class="ttdeci">double Y</div><div class="ttdoc">Vertical (y) coordinate, measured to the bottom of the origin.</div><div class="ttdef"><b>Definition:</b> <a href="_point_8cs_source.html#l00041">Point.cs:41</a></div></div>
<div class="ttc" id="astruct_vect_sharp_1_1_rectangle_html"><div class="ttname"><a href="struct_vect_sharp_1_1_rectangle.html">VectSharp.Rectangle</a></div><div class="ttdoc">Represents a rectangle.</div><div class="ttdef"><b>Definition:</b> <a href="_point_8cs_source.html#l00301">Point.cs:302</a></div></div>
<div class="ttc" id="astruct_vect_sharp_1_1_rectangle_html_a70c8f442271179e7cdd148435c132ded"><div class="ttname"><a href="struct_vect_sharp_1_1_rectangle.html#a70c8f442271179e7cdd148435c132ded">VectSharp.Rectangle.Location</a></div><div class="ttdeci">Point Location</div><div class="ttdoc">The top-left corner of the rectangle.</div><div class="ttdef"><b>Definition:</b> <a href="_point_8cs_source.html#l00320">Point.cs:320</a></div></div>
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